161438910 has 16 divisors (see below), whose sum is σ = 387453456. Its totient is φ = 43050368.

The previous prime is 161438897. The next prime is 161438923. The reversal of 161438910 is 19834161.

It is an interprime number because it is at equal distance from previous prime (161438897) and next prime (161438923).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2690619 + ... + 2690678.

It is an arithmetic number, because the mean of its divisors is an integer number (24215841).

Almost surely, 2^161438910 is an apocalyptic number.

161438910 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161438910 is an abundant number, since it is smaller than the sum of its proper divisors (226014546).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161438910 is a wasteful number, since it uses less digits than its factorization.

161438910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5381307.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 161438910 is about 12705.8612458975. The cubic root of 161438910 is about 544.5060867624.

The spelling of 161438910 in words is "one hundred sixty-one million, four hundred thirty-eight thousand, nine hundred ten".